Country superstar Keith Urban sat in with Gregg Allman and his solo band at Nashville, TN’s Ryman Auditorium on Friday night. Urban emerged partway through Allman’s set for a take on the classic T-Bone Walker number “Stormy Monday” as well as “Can’t Be Satisfied,” a song Allman recorded on his latest release Low Country Blues.

After Urban left the stage, Allman’s son Devon, who opened the night, took the stage for The Allman Brothers Band’s “Dreams.” For his encore, Allman invited both his son and Urban back out for another classic, “One Way Out.”

Both Urban and the elder Allman recently performed at Eric Clapton’s Crossroads Benefit. Urban—who mentioned how much he loves playing blues music—also sat in with The Rolling Stones.